package io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
/**
读取文本数据
 */
public class ReadStringDemo {
    public static void main(String[] args) throws IOException {
        File file=new File("fos.txt");
        FileInputStream fis = new FileInputStream(file);
        byte[] data = new byte[(int)file.length()];//创建与文件等长的字节数组
        fis.read(data);//一次性读取到数组中
        String line = new String(data, StandardCharsets.UTF_8);
        System.out.println(line);
        fis.close();
    }
}
